How to get value of ASP.Net AJAX ColorPicker control in Code behind

hi all

 i am trying to select color from ajax color picker selected color

for this i used below code

      <asp:TextBox ID="TextBox5" runat="server" Width="117px">choose color</asp:TextBox>
        <cc1:ColorPickerExtender ID="ccd1" runat="server" TargetControlID="TextBox5" ></cc1:ColorPickerExtender>

in code behind i am trying to select selected color by using

   string  val=ccd1.SelectedColor;

and

System.Drawing.Color c = System.Drawing.ColorTranslator.FromHtml(TextBox5.Text);
but both code returing null value. please Suggest me how to get color